Lever-press.



P. THEADORE. LEVER PRESS.

APPLICATION FILED JULY s, 1913.

1,133,512, 7 Patented Mal-.30, 1915.

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THE NORRIS PETERS CO, FHOT'QLITHO WASHINGIDN. D- C- PAUL THEAIDORE, 0F LANSING, MICHIGAN.

LEVER-PRESS.

Specification of Letters Patent.

Patented Mar. 30, 1915.

Application filed J' \11y'3, 1913. Serial No. 777,359.

To all whom it may concern:

Beit known that I, PAUL THEADORE, a citizen of the United States, residing at Lansing, in the county of Ingham and State of Michigan, have invented certain new and useful Improvements in Lever-Presses, of which the following is a specification.

My invention relates to hand presses and its purpose is to make a device that shall have the maximum of power, combined with ease and rapidity of manipulation and readiness of adjustment. I attain these purposes by the means shown in the accompanying drawings in which Figure l is an elevation of my device, partly in section to show the working parts. Fig. 2 is a plan view of one of the revolving platens and Fig. 3 is a longitudinal section of the shaft and eccentric along the central line of the operating lever 19.

Referring to the drawings, 1 is the head of my device and 2 the base, which are joined together by vertical bars 3. On one of the bars 3 is mounted a plurality of revolving platens 4, shown in plan in Fig. 2. The thickness of each of these platens is equal to the stroke of the ram of the press. These parts of the device, however, -may be of any well known and approved construction. An eccentric 5, shown in longitudinal section in Fig. 3, is mounted on the shaft 6, revolving in bearings formed in the head 1. A toggle joint 7 is integrally formed on the ring 8 of the eccentric 5 and operat vely connected to a pawl 9, which engages wlth a corresponding ratchet formed on the ram 10. The pawl 9 is kept normally pressed into engagement with the ram 10 by the spring 11, which may be adjusted by the nut 12. The spring 11 is connected to a lug 13 formed on the ring 8. Balancing springs 14 are introduced between the ring 8 and the pawl 9 at each side of the toggle joint for the purpose of maintaining the parallelism between the ram 10 and the pawl. The pawl 9 is adapted to be moved out of engagement with the ratchet of the ram so that the ram will be free for adjustment and automatic means for this purpose is provided, said means comprising a lug 15 on the ring 8 and an eccentric pin 16 adjustably supported on the head 1 and provided with an adjusting head 17 The pin 16 is so placed in position that when the pawl 9 is at its highest point the lug 15 of the ring 8 will engage with the said pin and revolve the ring so as to release the pawl 9 from the ram leaving the ram entirely free to be raised or lowered by a lever 18 provided for this purpose. The lever 18 has a pivotal link connection 20 with the head 1 intermediate its ends and near one end the lever is pivotally connected to the ram 10 and provided with a handle 18. A weight 23 is provided on the opposite end of the lever, the weight serving to counterbalance the weight of the ram 10. An operating lever 19 is firmly screwed to one extremity of the shaft 6.

. The operation of my device is as follows :-A sufficient number of the revolving platens 4 are brought inward to rest upon the base 2 to bring the article to be operated on to the required height. The lever is raised to the highest point so as to disengage the pawl 9 from the ram 10. The ram is then adjusted to a firm bearing by the lever 18 and the handle 19 is brought down.

As soon as the downward motion of the lever 19 begins, the pawl 9 engages with the ram 10 and forces it downward. When the downward stroke is completed, the ram is raised and the second stroke is made and so on until the full length of the ratchet on theram has been used. The ram is then raised to its full height by the lever 18 and if necessary another of the revolving platens 4 is placed in position and the operation is repeated. If desired, any suitable releasable means may be employed to prevent the ram from recoiling between strokes of the lever 19, but this is not ordinarily necessary in that class of operations in which presses of this character are commonly employed.

I claim as my invention and desire to secure by Letters Patent 1. In a press, the combination with a ram provided with a ratchet, of operating mechanism including an eccentric, a pawl operatively connected with the eccentric to' cooperate with the ratchet of the ram, means acting to normally maintain the pawl in engagement with the ratchet of the ram, and means acting automatically for disengaging the pawl from the ratchet of the ram.

2. In a press, the combination with a ram provided with a ratchet, of operating mechanism including an eccentric, a pawl operatively connected with the eccentric to cooperate with the ratchet of the ram, means acting to normally maintain the pawl in engagement with the ratchet of the ram, means acting automatically for disengaging the pawl from the ratchet of the ram," and a lever operatively connected to the ram to raise and lower the ram, said lever being provided with a counterbalance for the ram; 3. In a press, thecombination with a rain provided with a ratchet, of operating means including an eccentric, a pawl operatively connected with the eccentric to cooperate with the ratchet of the ram means yieldably maintaining the pawl in engagement with .the ratchet :of the ram, and mechanism. for automatically disengaging the pawl from the ratchet of the ram.

L In a press, the combination with aram provided with a ratchet, of a cam, a cam ring on the cam, a pawl pivotally connected with the cam ring to cooperate with the ratchet of the ram, springs engaging the pawl and cam ring and serving to maintain the parallelismbetween the pawl and the ratchet of the ram, a spring connected-with the cam ring and acting: to yieldably maintain the pawl in engagement with the ratchet of the ram, means for operating said cam, and mechanism foriautomatically disengaging the pawl from the ratchet of the film; 3 5. In a press, the combination with a ram provided with a ratchet, ofoperating mechanismvincluding a cam, a camring on the cam, a pawl pivotally connected with the cam ring to cooperate with the'ratchet of the ram and springs interposed betweenthe cam ring and pawl at each side of the pivotal connection of the pawl with the said ring.

- GQ'In a press, thecombination with a ram provided with a ratchet, of operating mechanism including a cam, a ring on the cam, a pawl operatively connected with the cam ring to cooperate with the ratchet of the ram, means acting, to normally maintain the pawl in engagement with the ratchet of the 7 and provided with a ratchet, operating mechanism including a cam, a ring, on the team, a pawl pivotally. connected with the cam ringv to. cooperate with the ratchet of the ram, a spring connectedr withi the, cam

ringand. with the support and acting to normally maintain the pawl; in engagement with 'theratchetiof the ram, and mechanism for automatically disengaging the pawl from the ratchet .of-the ram, said mechanism comprisingfla part on: the cam ring, and a .pin on thesupport. adapted toengage the part on the eccentric. V

Intestimonywhereof I affix my signature in the presence of two witnesses.

- PAUL THEADORE. Witnesses: 7 V 1 H. L. LAWRENGE,j MARION WAGNER.

Copies of this patent may be obtained for five cents each; by addressing the Commissioner of Patents,

Washington, D. (2,? r t 

